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Background <p><i>Staphylococcus coagulans</i>, formerly called <i>Staphylococcus schleiferi</i> subsp. <i>coagulans</i> is the second most common isolate from skin lesions of dogs with superficial bacterial folliculitis (SBF). However, the clinical significance of <i>S. coagulans</i> in pustules of canine SBF remains uncertain. This study aimed to investigate the prevalence and genotypic and phenotypic diversity of <i>S. coagulans</i> isolated from pustules in two dogs with SBF.</p> Results <p>Two dogs with SBF were included in this study. <i>S. schleiferi</i>/<i>coagulans</i> was isolated as the sole organism from three pustules in case #1, whereas it coexisted with <i>S. pseudintermedius</i> in two of seven pustules in case #2. <i>S. pseudintermedius</i> was the sole organism in the remaining five pustules in case #2. Whole genome sequences revealed that all isolates tested were annotated as <i>S. coagulans</i>. The isolates from the same pustules exhibited identical genotypic and phenotypic profiles, indicating clonal multiplication. <i>S. coagulans</i> isolated from different pustules exhibited similar yet distinct genotypic and phenotypic profiles.</p> Conclusions <p><i>S. coagulans</i> with identical genetic and phenotypic profiles can be identified as the sole pathogen or coexist with <i>S. pseudintermedius</i> in the pustules of the same dogs with SBF.</p>

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Genetic and phenotypic identities of Staphylococcus coagulans isolated from pustules of dogs with superficial bacterial folliculitis

  • 期刊论文

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  • 发表日期：

    2026年1月19日

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  • Takafumi Osumi,
  • Yuuki Shinomiya,
  • Thamonwan Wanganuttara,
  • Ichiro Imanishi,
  • Yotaro Shimazaki,
  • Keita Iyori,
  • Yoichi Toyoda,
  • Kaori Ide,
  • Jumpei Uchiyama,
  • Koji Nishifuji

摘要

Background

Staphylococcus coagulans, formerly called Staphylococcus schleiferi subsp. coagulans is the second most common isolate from skin lesions of dogs with superficial bacterial folliculitis (SBF). However, the clinical significance of S. coagulans in pustules of canine SBF remains uncertain. This study aimed to investigate the prevalence and genotypic and phenotypic diversity of S. coagulans isolated from pustules in two dogs with SBF.

Results

Two dogs with SBF were included in this study. S. schleiferi/coagulans was isolated as the sole organism from three pustules in case #1, whereas it coexisted with S. pseudintermedius in two of seven pustules in case #2. S. pseudintermedius was the sole organism in the remaining five pustules in case #2. Whole genome sequences revealed that all isolates tested were annotated as S. coagulans. The isolates from the same pustules exhibited identical genotypic and phenotypic profiles, indicating clonal multiplication. S. coagulans isolated from different pustules exhibited similar yet distinct genotypic and phenotypic profiles.

Conclusions

S. coagulans with identical genetic and phenotypic profiles can be identified as the sole pathogen or coexist with S. pseudintermedius in the pustules of the same dogs with SBF.